8533311921 has 24 divisors (see below), whose sum is σ = 12488164416. Its totient is φ = 5614133280.

The previous prime is 8533311907. The next prime is 8533311929. The reversal of 8533311921 is 1291133358.

8533311921 is a `hidden beast` number, since 8 + 533 + 3 + 119 + 2 + 1 = 666.

It is not a de Polignac number, because 8533311921 - 2²³ = 8524923313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8533311929) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 728491 + ... + 740111.

It is an arithmetic number, because the mean of its divisors is an integer number (520340184).

Almost surely, 2^8533311921 is an apocalyptic number.

It is an amenable number.

8533311921 is a deficient number, since it is larger than the sum of its proper divisors (3954852495).

8533311921 is a wasteful number, since it uses less digits than its factorization.

8533311921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12693 (or 12690 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 8533311921 is about 92375.9271726135. The cubic root of 8533311921 is about 2043.4901104988.

The spelling of 8533311921 in words is "eight billion, five hundred thirty-three million, three hundred eleven thousand, nine hundred twenty-one".